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Finding the Fourth Proportional to 1,383,498, 1,909,256.40 and 779,886

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Solution

The fourth proportional to 1,383,498, 1,909,256.40 and 779,886 is: 1,076,259.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,498 : 1,909,256.40 = 779,886 : x
  2. Step 2: Convert to fraction form
    1,383,498/1,909,256.40 = 779,886/x
  3. Step 3: Cross multiply
    1,383,498x = 1,909,256.40 × 779,886
  4. Step 4: Simplify right side
    1,383,498x = 1,489,002,336,770.40
  5. Step 5: Solve for x
    x = 1,489,002,336,770.40/1,383,498
  6. Step 6: Final answer
    x = 1,076,259.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.